在 imx6sx开发板环境下，A9搭载linux ，飞思卡尔将RPMsg用作ko文件来运行，接收M4的数据并像M4发送数据，但这个数据是RPMsg自身产生的，没有与linux的用户层进行数据交互，如果我想实现A9应用层数据与M4的应用层数据进行交互，应该怎么做？
Solved! Go to Solution.
In the M4 side, it is an echo server.
When echo back the data, the A9 side print out "READ finished: 13 bytes"
The source code in user space is mxc_mcc_tty_test.c im unit test.
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想问一下你是用yocto开发还是用源码直接编译
您好，我是yocto下载源码和制作文件系统，然后单独编译内核，但是我在内核和文件系统中没有找到mxc_mcc_tty_test.c，我使用的BSP版本是4.1.15，您是在哪找到的
you can get mxc_mcc_tty_test.c from
tmp/work/imx6ulevk-poky-linux-gnueabi/imx-test/1_5.4.1-r0/imx-test-5.4.1/test/mxc_mcc_tty_test
bitbake imx-test
It doesn't matter using Yocto or standalone build.
Please read the document in the BSP release.
The demo shown you is in the document.
i.MX_6_Linux_Reference_Manual.pdf
Chapter 51
Remote Processor Messaging (RPMsg)
能不能把mxc_mcc_tty_test.c这个文件发给我看下，谢谢
please check the virtual tty demo. It opens the virtual tty from user space.
您好，我查看代码，搞明白了M4的收发，A9的发送就是通过系统调用write写入数据，但是M4传给A9的数据，应用层如何调取，linux ttyRPMSG驱动好像没有实现read的操作，这块不是很明白，您能解答一下吗？
hi,Biyong
thanks for reply,and where can I obtain the source file mxc_mcc_tty_test.c?
I have replied to you already.
自己顶一下
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